反应详情

温度

80 °C

A solution of 5,6-dihydrofuro[2,3-c]pyridazin-3-yl trifluoromethanesulfonate (500 mg, 1.85 mmol) in dimethoxyethane (20 ml) was degassed then treated with tetrakis(triphenylphosphine)palladium (0) (116 mg), potassium carbonate (257 mg), 2,4,6-trivinylcyclotriboroxane pyridine complex (for a preparation of this reagent see F. Kerins and D. F. O'Shea, J. Org. Chem. 2002, 67, 4968-4971) (416 mg) and water (3.6 ml). The mixture was stirred at 80° C. for 2 hours then partitioned between DCM and saturated aqueous sodium bicarbonate solution. The aqueous phase was extracted with 10% methanol in DCM then the combined organic extracts dried and evaporated. The residue was chromatographed eluting with ethyl acetate affording a white solid (111 mg, 36%).

1. customfor a preparation of this reagent
2. customthen partitioned between DCM and saturated aqueous sodium bicarbonate solution
3. extractionThe aqueous phase was extracted with 10% methanol in DCM
4. customthe combined organic extracts dried
5. customevaporated
6. customThe residue was chromatographed
7. washeluting with ethyl acetate affording a white solid (111 mg, 36%)